Orthodontic appliance



FIG. 1 is a lower front perspective view of the orthodontic appliance shown as used in its environment;

FIG. 2 is a top perspective view of the design of FIG. 1;

FIG. 3 is a front view of the design of FIG. 1;

FIG. 4 is a right side view of the design of FIG. 1;

FIG. 5 is a top view of the design of FIG. 1;

FIG. 6 is a rear view of the design of FIG. 1;

FIG. 7 is a left side view of the design of FIG. 1; and,

FIG. 8 is a bottom view of the design of FIG. 1.

The broken lines shown in the figures represent portions of the orthodontic appliance that form no part of the claimed design. 

CLAIM An ornamental design for an orthodontic appliance, as shown and described. 